#!/usr/bin/env python3
"""DeltaTrace CLI - lightweight MVP launcher"""

import argparse
import json
from typing import List, Dict

from .trace import LocalEvent, PlanDelta, Metadata
from .adapters import FixFeedAdapter, ExchangeGatewaySandbox
from .replay import deterministic_replay


def _toy_delta_stream() -> List[Dict[str, object]]:
    # A tiny toy delta stream for demo purposes
    return [
        {
            "version": "0.1",
            "timestamp": 1.0,
            "nonce": "n1",
            "author": "tester",
            "contract_id": "CON-1",
            "delta_id": "D-1",
            "payload": {"decision": "BUY"},
            "signature": "sig1",
        }
    ]


def main():
    parser = argparse.ArgumentParser(prog="deltatrace", description="DeltaTrace MVP CLI")
    sub = parser.add_subparsers(dest="cmd", required=False)
    sub.add_parser("demo", help="Run a quick demo with toy delta stream and replay")
    sub.add_parser("replay", help="Run deterministic replay on a provided delta stream (JSON file)")

    args = parser.parse_args()

    if args.cmd == "demo" or args.cmd is None:
        # Quick demo: create toy events and run a tiny replay
        delta = _toy_delta_stream()
        # simple baseline log mirroring delta ids
        event_log = [{"delta_id": d["delta_id"]} for d in delta]
        result = deterministic_replay(delta, event_log)
        print(json.dumps(result, indent=2))
        return

    if args.cmd == "replay":
        # In a full implementation, we'd parse a JSON file from argv; here we provide a friendly fallback
        print("Replay command not wired to a file in this MVP stub.")
        return


if __name__ == "__main__":
    main()